Home » Nuclear Physics » Fission and Fusion again

Fission and Fusion again

Vivek Asks:

Fusion gives more energy than fission right? When a uranium nucleus fissions into two daughter nuclei fragments, an energy of ~200 MeV is released. Whereas in a fusion of deuterium to give helium atom, only 18.3 MeV is released (which is the maximum?). Yes, the nucleus of uranium are heavier but the same deuterium fusion occurs in the stars and gives off a much larger amount of energy.

 

Ans:

If we consider energy released per reaction (fission or fusion), energy released is more in the case of fission.

If we consider energy released per unit mass (say one kg Uranium and 1 kg hydrogen), the energy released in fusion is very much larger than in the case of fission.

In fusion about 4 amu releases approx 20 MeV whereas in fusion about 236 amu releases approx 200 MeV


1 Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hits so far @ AskPhysics

  • 2,266,025 hits

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,340 other subscribers

February 2021
M T W T F S S
1234567
891011121314
15161718192021
22232425262728

Schrodinger’s Cat in Daily Life

%d bloggers like this: